l和r哪个是左哪个是右

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select * from tbl_Articles WHERE ArticleID=500466 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=500466 LIMIT 0,1
select * from tbl_Articles_sphinx where id=500466 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1131031,1129517,1128577,1110448,1117876,1125321,1111348,1111536,1109312,1108061,1122106,1105910,1089102,1114248,1132139,1103845,1130003,1123877,1043770,1124439,1109262,1094747,1114288,1106851,1122404,1113331,1127017,1104507,1122885,1129195) ORDER BY field (ArticleID,1131031,1129517,1128577,1110448,1117876,1125321,1111348,1111536,1109312,1108061,1122106,1105910,1089102,1114248,1132139,1103845,1130003,1123877,1043770,1124439,1109262,1094747,1114288,1106851,1122404,1113331,1127017,1104507,1122885,1129195)